Molecular Organic Crystals

Crystal energy matrix, 307 Crystal Hamiltonian, 294, 307 Crystals, organic molecular, 286, 327 Cube, Cn axes of, 19 commutation of, 23 symmetry operations of, 23 symmetry planes of, 20, 21 Cubic point groups, 66ff Current density, 109 Cyclobutadiene, v molecular orbitals of, 178-179... 

E.A. Silinsh, in Organic Molecular Crystals, Springer, Berlin 1980. 

N. Karl, Laser emission from an organic molecular crystal, Physit o Stums Solidi A 1972, 13, 651. 

Muller, K., Kothe, G., and Wassmer, K.-H. Dynamic Magnetic Resonance of Liquid crystal Polymers Molecular Organization and Macroscopic Properties. Vol. 95, pp. 1 — 56. 

Tsiper EV, Soos Z, Gao W, Kahn A (2002) Electronic polarization at surfaces and thin films of organic molecular crystals PTCDA. Chem Phys Lett 360 47-52... 

Silinsh EA (1980) Organic molecular crystals their electronic states. Springer, Berlin... 

Many substituted uranocenes have been made and there is a substantial body of organometallic chemistry of uranocene derivatives now known 16, 17). Some of this chemistry will be mentioned in passing but wiU not be covered in a systematic way since other reviews of the organic chemistry are available 18). The only other actinide cyclooctatetraene complex structurally characterized to date is bis[(l,3,5,7-tetramethylcyclooctatetraenyl]uranium(IV) 19), which was of interest because the presence of methyl groups allowed the planarity and relative orientation of the dianion rings to be determined. Crystal and molecular parameters for these three actinide compounds are summarized in Table 1. 

Silinsh EA, Capek V (1994) Organic molecular crystals. Interaction, localization and transport properties. American Institute of Physics, New York... 

In addition to the preparation of molecular cocrystals by conventional solution phase crystallization, many materials (e.g. organic molecular cocrystals) can be prepared only by grinding together two (or more) solid phases to generate a single... 

Even so great an admirer of Werner as Paul Pfeiffer (1875-1951),93 Werner s former student and one-time chief of staff at the University of Zurich and the man who first applied Werner s theory to crystal structures (see Section 1.1.5.4), proposed modifications of the coordination theory. He applied what he called the principle of affinity adjustment of the valencies to overcome certain shortcomings of Werner s theory.94 He considered the ionizable radicals or atoms in the outer sphere to be combined with the complex radical as a whole and not attached definitely to the central atom or to any of its associated molecules. He also applied this idea to complex organic molecular compounds. However, Pfeiffer s modifications should not be interpreted as attacks on Werner s ideas. 

While the study of the conventional semiconducting materials has progressed rapidly, the study of organic materials has received much less attention until the past few years. In particular the electrical properties of polymers have been much neglected and little authoritative work exists in the literature. In view of current developments in theories of the electrical properties of organic molecular crystals, it seems profitable to take stock of the situation as far as charge transfer in polymers is concerned. 

Raman, R., and S. P. McGlynn Hole mobility in organic molecular crystals. 

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